CF1: mDNSResponder troubleshooting for Apple/Container (#30994)

* CF1: mDNSResponder troubleshooting for Apple/Container

Added troubleshooting steps to resolve CF_DNS_PROXY_FAILURE caused by mDNSResponder binding to port :53 when the container system is started before Cloudflare One Client or while CloudFlare One Client is turned off.

Author: bmurithi

src/content/docs/cloudflare-one/team-and-resources/devices/cloudflare-one-client/troubleshooting/client-errors.mdx

@@ -105,6 +105,10 @@ Below is a non-exhaustive list of third-party software that are known to cause `
   1. Stop/quit all VMs.
   2. Connect the Cloudflare One Client.
   3. Start the VMs again.
+- **Apple Container**: [Apple Container](https://github.com/apple/container) will also bind `mDNSResponder` to port `53` if started before the Cloudflare One Client (or while the Client is stopped).
+  1. On macOS, run this in the terminal to temporarily stop the container system: `container system stop`
+  2. Cloudflare One Client DNS mode should now start with no errors.
+  3. You can then restart the container system (`container system start`) and pass explicit DNS flags when running containers.
 
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